Sewing-machine.



J. R. MOFFATT.

SEWING MACHINE.

APPLlCATlON HLED DEC.22, 190s.

Patented July 6,v 1915.

s SHEETS-SHEET 1 J. R. MOFFATT.

SEWING MACHWE.

APPLICATION man an. 22. 1906.

Patented July 6, 1915.

6 SHEETSSHEET 2- I I y v 1. a. MOFFATT. I SEWlNG MACHINE. A'PPLICATION HLED DEC- 22. 1996.

1 145 6059 Patented July 5, 1915.

8 SHEETS-SHEET 3.

WNW

j. R. MOFFATT.

SEWING MACHINE.

APPUCAUON FILED DEC. 22, 190 7 1,145,605. 6 atented July 6,1915.

6 SHEETS-SHEET 4.

Fa Q F g- Wi m eases L R. MOFFATT.

SEWING MACHINE.

APPLICATION FILED 050.22, mm.

Patented July 6, 1915.

6 SHEET SSHEET 6.

UNITED STATES Pn'rENT ornicn.

JAMES R. MOFFATT, OF CHICAGO, ILLINOIS, ASSIGNOR T0 UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEWING-MACHINE.

Specification of Letters Patent.

Patented July 6, 1915.

T (1// Ir/mm. '1'! may concern Be it known that I, JAMES R. Morra'r'r, a. citiZcn of the l nited States, residing at Chicago, in the county of Cook State of Illinois. have invented certain new and useful Improvements in Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

My invention relates to improvements in sewing machines and more particularly to the means for holding the fabric while the same is being stitched.

An object of my invention is to construct a fabric holding means which shall aid in feeding the fabric to the stitching mechanism.

A further object of my invention is to provide a fabric holding means which is readily removed from the fabric so as to enable the operator to readily place the fabric in the machine or remove the same.

These and other objects will in part be obvious and will in part be more fully hereinattcr described.

My invention consists in the novel parts and arrangementshereinafter shown and described.

In the accompanying drawings which show one embodiment of my invention: Figure 1 is a rear side elevation of a sewing machine embodying my invention, the parts holding the fabric being shown as resting on the work support; Fig: 2 is a view similar to Fig. l with the presser holding members raised from the work support and showing in dotted lines the manner of moving' the roller presser foot away from the stitching point: Fig. 3 is an end elevation of my machine. certain parts being broken away forv the. sake of clearness; Fig. 4 is a detail showing in side elevation the means for rotating theroller presser; Fig. 5 is a detail front view showing the roller presser foot and the means for adjustably supporting the same; Fig. (3 is a sectional View on the line y, y of Fig. 5: Fig. 7 is a sectional view on the line 2 of Fig. 6; Fig. 8 is a sectional view on the line :0, a: of Fig. .6; Fig. 9'is a detail perspective view of oneof the gr pping members of the friction clamp; Flg. 10 is a front View of the carrier for the gripping members; Fig. 11 is a side view of the carrier in Fig. 10; Fig. 12 is a detail 4 is the usual presser bar 6 which is capable' of reciprocating in the lugs 3 and '7. Said presser bar carries a foot 8 at its lower end, which cooperates with the feed dog and the work support 1 in holding and feeding the fabric to the stitching mechanism. The presser bar 6 is provided with a collar 9 having a lug 10 projecting therefrom. A

suitable spring 11 mounted on a bracket 12' rests upon the upper surface of the lug 10, and normally tends to hold the presser foot upon the work support. The tension on the spring 11 may be adjusted by a suitable screw 13 passing through a lag 14 on the overhanging arm and bearing upon said spring 11 intermediate its ends. I have provided a lever for lifting the presser foot. Said lever 15 is pivoted to the overhanging arm at 16 and extends forwardly wardly underneath the lug 10.

portion of the lever 15 extends toward the rear of the machine and has its end rounded off forming a cam surface 17. A lever 18 also pivoted on the head of the machine at a point 19 carries a lug 20 shown in dotted lines in Figs. 1 and 2. Said lever 18 is oscillated by an arm 21 which may be operated by hand or by a suitable treadle. The lever 18 and lug 20 are so disposed relative to the cam end of the lever 15 that as said lever 18 is swung about its pivot the lug 20 engages the lever 15 and gradually lifts the presser foot from the work support. It will be noted that the rear end of the lever 15 is so shaped that after the lug 20 reaches the position shown in Fig. 2, a further movement of the lever 18 to the position shown in dotted lines in Fig. 2 is permitted and during this latter movement of the lever 18, the lug 20 serves to hold the presser foot raised but does not lift the same farther from the work support. In order to hold the lever 18 out of engagement with the lever 15, I have and back- The other provided a spring 22 which issecured to the lever 18 at one end and to the overhanging arm at the other end. I have also provided my machine with a roller presser foot 23 which is supported by an arm 24 shown in dotted lines in Figs. 1 and 2 and in full lines in Figs. 4 and 5. Said arm 24 is pivoted to a bracket at 26. Said bracket 25 is ad;

justably secured to a projecting lug 27 carried by the presser bar of-the machine by suitable slots 28,28 and screws 29, 29. At

the lower end of the arm 24 is an enlarged.

7 from a link 36 which is adjustably secured at thereto by a suitable bolt 43.

one end to an arm 37 formed integral to the rock shaft and is pivotally connected at its other end to a member 38 which is reciprocated by an eccentric 39 carried by the main shaft 40. The forward end of the rock shaft 33 has a depending arm 41. Pi'voted to said arm 41 is an arm.42 which is forked so as to embrace the arm 41 and is connected The lower endof the arm 42 is operatively connected to the roller presser foot by means of a link 44. Saidlink 44 is pivoted at one end to the arm42, and at its other end to the driving member for the friction grip of the roller presser foot. It will be noted that asthe shaft 33 is oscillated the arm 41 mo es therewith and the arm 42 will also parta e of the oscillating movement of the shaft 33.

The specific means for intermittently rotating the roller presser foot is more clearly shown in, Figs. 6 to 10 inclusive and consists of a driving member 45 which is freely mounted to oscillate about the shaft 31.

backward and forward oscillating movement to the driving member 45 about the shaft 31. The roller presser foot is providedon ,the rear side with acircular recess 46.

WVithin said recess 46 is mounted a carrier 47 for the gripping members. Said carrier is provided with a notch 48 which receives a pin 49 carried by the driving member 45. Said carrier 47 is provided with suitable recesses 50, 50 in each of which is mounted a gripping member 51.

lies adjacent to the curved wall of the roller presser foot and said member also has an inwardly extending shank'52. The driving member 45 also carries a cam 53 which is formed integral therewith and extends between the shanks 52, 52 of the gripping Said grippingmem-- bers 51 have an outer curved surface which members. The'operation of my intermittent rotating device will be obvious. When the driving member 45 is rotated in the direction of the arrow in Fig. 8, the 49 is withdrawn slightly from the carrier 47 and the cain 53 engaging the shanks 52 of the gripping members 51 cause the said members 51 to be forced into gripping engagement with the roller foot and said roller foot will partake of the movements of the driving member. \Vhen however, the driving member is rotated in-the opposite direction the pin 49 contacts with the carrier 47 before the cam 53 causes the members 51 to grip the roller foot and the carrier together with the gripping members 51, will lfie oscillated within the recess in the roller oot.

It will be noted that the supportingarm 24 is carried by a lug mounted on the presser bar and therefore, whenever the presser bar is lifted through the lever 15 the roller foot will also be lifted with the presser foot as shown in Fig. 2. The arm 42 which is pivotally connected to the arm 41 extends slightly above its pii otal point and is pivotally connected at- 5-1 to a rod which has a sliding engagement at its other end with the lever 18. The rod is provided with a stop collar 56 which is adjustably secured to the rod by a set screw 57. A collar 58 is also adjustably secured to the rod 55 by a set screw 59. The rod 55 has its sliding engagement 'with the lever 18 between the collars 56 and 58. A bracket (30 secured to the lug 34 has a depending forked end. 61 shown in Fig, 4 which surrounds the rod A spring 62 encircles the rod and engages at one end the stop collar 58 while at its other end said spring bears against the forked end of the bracket 60. ,Vhen the lever 18 is oscillated to lift the presser bar and rollerfoot from the work support, the end of said lever engaging the rod does notmove the rod until said end comes in contact with the stop collar 58, as shown in, Fig. 2. When the lever has reachedi the position shown in Fig. 2, the lug 2.0 has served -to lift the presser foot, and theroller oscillates the arni 42 and through its con nection with the link 44, causes theroller foot to be moved laterally, swinging the arm 24 about its pivotal connection 26, as shown in Fig. 2. When the lever 18 is turned'in the-opposite direction, the spring 62 will imme'diately move the roller presser back into its normal position adjacent the presser foot. and as the lug continues to hold the roller presser and prcsser foot raised until the lever 18 reaches the position shown in Fig. it will be seen that the roller presser foot will be moved back into its normal position adjacent the presser foot. before the presser foot and roller presser are lowered upon the work support or fabric. The'stOp collar 58 ser es to insure the proper returning of the roller presser foot.

I have provided an adjustable stop (53 for the lever 1H, so that when said lever 18 is depressed the same engages said stop and prevents further movement of the lever. I have shown said stop (33, as carried by the lever 15. by means of a suitable screw (it, which passes through a slot in said stop. It is obvious. however. that said stop may be mounted upon any of the members of the machine. so long as the same is located in the path of the lever 18.

The feed dog F, which is carried by the work support. operates through suitable feed slot therein. This feed dog is carried by the feed bar (36. The feed bar (36 is supported by a bracket (37. which is pivotally carried by the arm (3H. rigidly secured to a shaft (if) mounted in suitable hearings in the work support. Said shaft (if) is oscillated by a cam on the main shaft 40. by a fork T13. secured to the shaft (39 by screws 73. 73. This oscillation of the shaft (35) causes the bracket to rise and fall, thus giving the rising and falling movements to the feed dog F. The bracket (37, carrying the feed bar (it;

is also provided with a projecting pin H.

which is connected to a crank pin 75. carried by the main shaft 40 by a link 71. The movements of the crank pin oscillate-the bracket (37 on its pivotal connection with the arm 8. and thus gives to the feed dog 1 its backward and forward movement to feed the fabric. The crank pin T5 is :uljustably mounted in a slot in the front end of the driving shaft. and by adjusting the same nearer to or farther from the center of the shaft. the length of feed movement may be adjusted.

lt. will be noted that by adjusting the conncction between the link 56 and the lever 37, the amount of movement given the roller presser foot may be changed. The means for adjusting the main feed I is entirely in dependent of the means for adjusting the movements of the roller presser foot. These parts may be adjusted. therefore. so that the roilcr presscr foot will have a longer duraim t of movement. This is an important feaespecial y where operating upon heavy or with very thin portions of teather around curves. and the like. as the ti; ock has a tendency to stretch out under the 'iressure of the roller. and the presser foot. The movement of the roller presser foot after the main feed has finished. has a tendency vto counteract this stretching process.

It will be obvious that minor changes in the details of the construction herein shown and described, may be made without departing from the spiritof my invention.

Having thus particularly described my invention. what 1 claim as new and desire to secure by Letters Patent is:

1. The combination with a work support of a. presser member ediperating therewith. means for raising said presser member. means independent thereof for moving said presser member laterally. and a connnon member for operating both of said means; substantially as described.

2. The combination with a work support of a presser member coiiperating therewith. means for raising said presser member. means independent thereof for moving said presser member laterally. and a common member for operating said presser member raising means and for subsequently operating the means for moving the presser member laterally; substantially as described.

3. The combination with a work support of a presser bar, a presser foot carried thereby. a roller presser member adjacent to said presser foot and carried by said presser' bar, means for simultaneously raising said presscr foot and said roller presser member, and for subsequently moving said presser member laterally away from said presser 4 foot: substantially as described.

l. The combination with a work support I of a presser foot. a roller presser member located adjacent thereto. means for raising said roller presser member and for subsequently moving the same laterally away from the presser foot; substantially as de scribed.

The combination with a work support of a roller presser member. means for yieldingly holding said roller presser member on said work support aml means for raising said presser member and for subsequently moving the same laterally; substantially as described.

o. The combination with a work support of a roller presser member, means for yieldinglyholding said roller presser memb -r on said work support, means for raising said presser member and for subsequently moving the same laterally. and a stop for limiting the lateral moven'lent of said prcsser member; substantially as described.

7. The combination with a work support, of a presser foot, a roller presser member, means for adjustably supporting said roller presser member. means for raising said roller presser member and for moving the same laterally relative to the presser foot.

8. The combination with a work support of a presser foot, a roller presser member,

i means for adjustably supporting said roller presser member, roller presser member laterally relative to said presser foot, and means for limiting the lateral movement of said presser member; substantially as described;

9. The combination with a work support of a presser foot, a presser bar carrying said presser foot, a roller presser member, means carried by said presser bar for supporting said roller presser member andmeans for moving said roller presser member laterally away from, said presser foot comprising a lever and connections between said lever and said roller presser member; snbstantiallyas described. 1

10. The combination with a work support of a presser foot, a presser bar for supporting said presser toot, a, roller presser member, means carried by said presser bar for' supporting said rollerpresser member and means for raising said presser bar and for moving said roller presser member laterally away from said 'presser foot comprising a lever and connections between said lever and said roller presser member; substantially as described.

11. The combination with a work support of-a presser foot, a presser bar for support: ing said presser ber,. means carried by said presser bar for supporting said roller presser member and means for raising said presser moving said roller presser member laterally from said presser foot comprising a lever and connections between said lever and said roller presser member, a spring for return ing said presser member to its normal posi tion adjacent the presser foot; substantially as described. v

12. The combination with a work support of a roller presser member, means for intermittently operating said roller presser member; means for raising said presser member and means for moving said presser member laterally at an angle tothe line of feed and out of operative position; substantially as described. v

13. The combination with a Work support I of a roller presser member, means for intermittently operating said roller presser member, means for raising said presser member; means for moving said presse', member lat- ,erally out of the line of feed and out of operative position, a spring for returning said presser member to its normal position; sub

stantially as described.

let. The combination with a work support of a presser foot, a roller presser member, means for intermittently rotating said rollerpresser member and meansfor moving said roller pi'esser memberlaterallyaway from said presser foot and out of operative positioii; substantially as described.

15. The combination with a work support means for nioving'said' of a roller presser member, a rock foot, a roller presser mem bar and for ,member laterally; substantially as described.

16. The combination with a work support shaft, means for oscillating said rock shaft. means connected with said ,roek shaft for rotating said pressermeniber and means operating through said presser rotating means for moving said roller pres-sci member laterally; substantially as described.

17. The combination with a work support of a roller presser member, means for supporting the same, means for raising said supporting means, means independent thereof for moving said presser member laterally; and a common member for operating both of said means; substantially as described.

18. The combination with a work support, a roller presser member, means for supporting the same, means for intermittently rotating said roller presser member,

and means for moving said presser member laterally, comprising an operating arm, a

,rod pivotally connected to said operating arm, a spring for moving said rod in one direction and a lever'for moving said rod in the opposite direction; substantially as described.

19. The combination with a work sup port, a presscr bar, a roller presser member carried thereby. a lever for reciprocating said presser bar and a second lever having rotating said presser a lug for engagiiig'said first named lever for operating the same 'to 'aise'the presser bar and means for moving said roller presser member laterally relative to said bar; substantially as described.

.20. The combination with a work support, a 'presser bar, a roller presser member carried thereby, a lever for raising said presser bar and a second leverliaving a lug for engaging said f rst namedlever for operating the same to raise the presser bar, and means operated by said second named lever for moving said roller p'resser member laterally; substantially as described- "21, The combination with a' work siipport, a presser bar, a roller presser member carried thereby, a lever for raising said presser bar, a second lever having a lug for engaging said first named lever for ope 'at-.

ing the same to raise the presser bar, and means for moving said roller presser member laterally including a rod having a sliding connection, a second lever and stop collars carried bysaid'rodwhereby said roller presser member may be moved laterally; substantially as described.

2-2, The combination with a work support of a roller resser member, means for sup- 

